#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define reps(i, n) for (int i = 1; i <= (n); i++)

int main() {
    string s; cin >> s;
    cout << "Hello World!" << endl;
    return 0;
}